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Enhancing single and multi-component adsorption efficiency of pharmaceutical em...

Water contamination with pharmaceuticals like acetaminophen (ACT), sulfamethoxazole (SMX), and phenolic compounds such as gallic acid (GA), have become a global concern. These contaminants are persistent environmental pollutants that threaten aquatic life and human health. Adsorption is recognized as an efficient and low-cost solution to tackle water pollution. In this study, the efficiency of three adsorbents—...

Response surface method-driven design of experiments for the synthesis of fly a...

The growing need for sustainable wastewater treatment solutions has led to exploring alternative materials to explore large-scale and reliable technologies. This study focuses on optimizing the synthesis of geopolymers based on fly ash using a Box-Behnken experimental design to enhance their adsorption efficiency for phenolic compounds, as gallic acid model pollutant which are widely found in wastewater leachin...

Breakthrough Curves for the Continuous Adsorption of Micropollutants on Activat...

Breakthrough curves are key for designing continuous flow adsorption systems, typically obtained experimentally or through modeling [1]. In this study, a mixture of activated carbon (AC) and geopolymers (GP) was tested in a continuous treatment system for the removal of model contaminants from waters in a single-component system composed of sulfamethoxazole (SMX), acetaminophen (ACT), or gallic acid (GA). In ad...

Synthesis and Characterization of Activated Carbons, Geopolymers, and Carbon Na...

Circular Economy implies strategies for waste valorization and reuse to produce higher-value products [1]. In this context, exhausted olive pomace, a waste biomass derived from olive industry was used to synthesize activated carbon (AC) through slow pyrolysis, followed by activation with CO2 to optimize the adsorbent's porosity. The pyrolysis furnace was initially maintained under an inert atmosphere with a nit...

Acorn flour from holm oak (Quercus rotundifolia): Assessment of nutritional, ph...

Acorn is the fruit of holm oak (Quercus rotundifolia), being mainly used nowadays to feed animals, however a substantial part remains in the fields without any valorization. Underexploited crops are gaining new interest, driven by food security concerns and health benefits potential as well. In the present work, it was studied the physicochemical characteristics and functional perspective of acorn flour, as an ...

Gestão de efluentes vinícolas: potencialidades da sua reutilização na rega de e...

Neste estudo pretendeu-se avaliar a possibilidade da reutilização de um efluente vinícola (EV) tratado para rega de espécies ornamentais. Para tal, realizaram-se inicialmente testes de fitotoxicidade em sementes de Lepidium sativum e de uma mistura de relva, sujeitas a concentrações crescentes de EV e um ensaio de rega em Petunia x atkinsiana com diferentes tratamentos: EV sem diluição (EV100%), efluente diluíd...

Biodegradation of olive mill wastewaters by a wild isolate of Candida oleophila

Performance evaluation of Portuguese constructed wetlands for municipal wastewa...

Constructed wetlands have been used as a technology appropriate for the treatment of municipal or domestic wastewater in some villages in Portugal. Most of constructed wetlands present a low cost (installation and maintenance), low energy requirements and technical skills of operators, environment friendly landscape, and good efficiency and reduced production of sludge. In a situation where is a need of appropr...

Sustainability indicators of subsurface flow constructed wetlands in Portuguese...

The discharge of untreated domestic wastewater in the receiving waters creates a negative and environmental impact, inversely proportional to its autodepuration ability. Conventional wastewater treatment plants involve large capital investments and operating costs, and could be economically unsustainable for small-medium communities. So, constructed wetlands as natural low-cost systems can be an appropriate alt...

Avaliação do desempenho de sistemas de leitos de macrófitas no tratamento

Tratamento sustentável de águas residuais domésticas em pequenos aglomerados populacionais, face aos seus baixos custos (instalação e manutenção), menores requisitos energéticos e de qualificação técnica dos operadores, fácil enquadramento paisagístico, boas eficiências e reduzida produção de lamas. Numa conjuntura em que se impõe um tratamento adequado das águas residuais dum grande número de pequenos aglomera...